The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 15, 2002
Filed:
May. 22, 2001
Applicant:
Inventor:
Chi-Yuan Cheng, Taichung, TW;
Assignee:
Hiwin Mikrosystem Corp., Taichung, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 1/04 ;
U.S. Cl.
CPC ...
H02P 1/04 ;
Abstract
A controlling device for a DC motor speed variation including a power supply circuit, a pair of relays and an interlock circuit for alleviating shock arising from the initiation and termination of a DC motor operation. The controlling device protects the DC motor from catastrophic failure through a sudden variation of the armature current. The controlling device interlocks the direction of the motor rotation while simultaneously providing over current protection for the DC motor.